1、BRITISH STANDARDBS EN 60519-3:2005Safety in electroheat installations Part 3: Particular requirements for induction and conduction heating and induction melting installationsThe European Standard EN 60519-3:2005 has the status of a British StandardICS 25.180.10g49g50g3g38g50g51g60g44g49g42g3g58g44g5
2、5g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 60519-3:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 21 October 2005
3、 BSI 21 October 2005ISBN 0 580 46516 0National forewordThis British Standard is the official English language version of EN 60519-3:2005. It is identical with IEC 60519-3:2005. It supersedes BS EN 60519-3:1996 which is withdrawn.The UK participation in its preparation was entrusted to Technical Comm
4、ittee PEL/27, Electroheating, which has the responsibility to:A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in th
5、e BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible f
6、or its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interes
7、ts informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 18, an inside back cover and a back cover.The BSI copyright notice displayed in this document
8、 indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD EN 60519-3 NORME EUROPENNE EUROPISCHE NORM June 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Kom
9、itee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60519-3:2005 E ICS 25.180.10 Supersedes EN 60519-3:1995English version Safety in ele
10、ctroheat installations Part 3: Particular requirements for induction and conduction heating and induction melting installations (IEC 60519-3:2005) Scurit dans les installations lectrothermiques Partie 3: Rgles particulires pour les installations de chauffage par induction et par conduction et pour l
11、es installations de fusion par induction (CEI 60519-3:2005) Sicherheit in Elektrowrmeanlagen Teil 3: Besondere Anforderungen an induktive und konduktive Erwrmungsanlagen und an Induktionsschmelzanlagen (IEC 60519-3:2005) This European Standard was approved by CENELEC on 2005-04-12. CENELEC members a
12、re bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to
13、 the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has th
14、e same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, P
15、ortugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. - 2 - Foreword The text of document 27/446/FDIS, future edition 3 of IEC 60519-3, prepared by IEC TC 27, Industrial electroheating equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 6
16、0519-3 on 2005-04-12. This European Standard supersedes EN 60519-3:1995. Significant technical changes with respect to EN 60519-3:1995 are as follows: the latest edition of EN 60519-1 (2003), in particular the extension of the scope to cover also voltage band 3 equipment with rated voltages not exce
17、eding 3 600 V AC or 5 000 V DC, has been taken into account; definitions have been brought into line with the second edition of IEC 60050-841. This part of EN 60519 is to be used in conjunction EN 60519-1:2003. It is intended to modify, replace or make additions to EN 60519-1 for particular requirem
18、ents for induction and conduction heating and induction melting installations. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2006-01-01 latest date by which the national sta
19、ndards conflicting with the EN have to be withdrawn (dow) 2008-04-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60519-3:2005 was approved by CENELEC as a European Standard without any modification. _ EN 60519-3:2005 3 CONTENTS 1 Scope 4 2 Norm
20、ative references .4 3 Terms and definitions .5 4 Heating inductor .5 5 Capacitors6 6 Mains frequency power sources 7 7 Solid-state frequency converters.78 Switchgear .79 Cables, wires and busbars8 10 Liquid cooling .9 11 Rating plate9 12 Clearance and creepage distances .9 13 Protection against elec
21、tric shock.10 13.1 Protection against direct contact 10 13.2 Protection against indirect contact .10 13.3 Special requirements .11 13.4 Earthing provisions11 13.5 Protective conductors 12 14 Radio interferences 12 Annex A (normative) Specific requirements for induction and conduction heating install
22、ations 13 Annex B (normative) Specific requirements for induction melting installations .16 Annex ZA (normative) Normative references to international publications with theircorresponding European publications .18 EN 60519-3:2005 4 SAFETY IN ELECTROHEAT INSTALLATIONS Part 3: Particular requirements
23、for induction and conduction heating and induction melting installations 1 Scope This part of IEC 60519 is applicable to installations for induction and conduction heating of solids, at low, mains, medium and high frequencies (for conduction heating, use of direct current is also included); installa
24、tions for induction melting, holding and superheating liquid metal at low, mains, medium and high frequencies; those parts of the conveying or handling equipment of the electroheat installation which are within the influence of the heating section. Examples of application are: installations for indu
25、ction and conduction heating of slabs, billets, rods, strip, wire, tubes, rivets, etc. for subsequent hot forming and heat treatment; installations with induction crucible furnaces or induction channel furnaces. This standard consists of requirements common to both induction and conduction heating i
26、nstallations and induction melting installations (Clauses 1 to 14) and specific requirements for induction and conduction heating installations (Annex A) and specific requirements for induction melting installations (Annex B). 2 Normative references The following referenced documents are indispensab
27、le for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-841:2004, International Electrotechnical Vocabulary Part 841: Industrial electroheat IEC
28、60110-1:1998, Power capacitors for induction heating installations Part 1: General IEC 60143-1:2004, Series capacitors for power systems Part 1: General IEC 60364-4-41:2001, Electrical installations of buildings Part 4-41: Protection for safety Protection against electric shock IEC 60519-1:2003, Saf
29、ety in electroheat installations Part 1: General requirements EN 60519-3:2005 5 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60050-841 (some of which are repeated here), IEC 60519-1 and the following apply. 3.1 induction heating electric heating u
30、sing the Joule effect produced by induced currents IEV 841-27-04 3.2 conduction heating resistance heating, in which the current flows through the material to be heated 3.3 heating section that part of the equipment in which heating by induction or conduction takes place 3.4 heating inductor compone
31、nt, e.g. coil or coils, of induction heating or induction melting equipment, carrying an alternating current and designed to create the magnetic field which induces currents in the charge IEV 841-27-48, modified 3.5 contact system component of a conduction heating work station by which the charge is
32、 electrically connected to the heating circuit 3.6 induction crucible furnace induction melting furnace or induction holding furnace in which the heat is generated directly in the charge, or in the crucible containing it, by means of a heating inductor arranged around the crucible IEV 841-27-32, mod
33、ified 3.7 induction channel furnace induction melting furnace or induction holding furnace consisting of one or more refractory lined chambers into which the charge to be heated or melted is placed and to which one or more channel inductors are attached IEV 841-27-30 4 Heating inductor 4.1 Heating i
34、nductors with high power ratings may be equipped with yokes (coil flux guides) to guide the magnetic flux outside the induction coil/s to reduce stray fields possibly heating the surrounding metal structure. EN 60519-3:2005 6 The design of these yokes should take care of the risk of their being exce
35、ssively heated by eddy currents. 4.2 Where the heating inductor or parts of it are intended to be replaced due to wear or exchanged to meet a new production requirement, the manufacturers instructions shall be followed. 4.3 Should the effect of cooling of the heating inductor become insufficient and
36、 cause danger to personnel or damage to essential parts of the equipment, an alarm signal shall be given and the heating power switched off automatically. 4.4 For electroheat equipment with forced cooled heating inductors having a charge and/or lining of high heat capacity it is advisable to have an
37、 emergency supply for cooling the coil(s) and where applicable the conveying equipment, until the hot charge has been removed and until the lining has cooled to a safe temperature. 4.5 The voltage applied to heating inductors, for example, coils with tappings, shall not exceed the manufacturers rati
38、ng. 4.6 The electrical equipment shall dispose of an adequate voltage limiting system to prevent the voltage of the heating inductor from exceeding the limit of 3 600 V AC. 5 Capacitors This clause deals with power capacitors. Other capacitors, for example, installed in control circuits, are covered
39、 by 6.2.4 of IEC 60519-1. 5.1 All necessary precautions shall be taken to rapidly discharge capacitors which could be dangerous to touch after they have been switched off. A warning notice shall be displayed in a visible position stating that the discharge has to be effected before touching the capa
40、citors. 5.2 For capacitors permanently connected in parallel to a heating inductor or a transformer, the discharge device may be dispensed with. Where capacitors connected in parallel to an inductor or a transformer are disconnected only in the off-load condition, the discharge device may be dispens
41、ed with, providing a sufficient time delay occurs for the discharge between switching off the supply and opening the capacitor switch. If there is a risk of DC charging, the discharge device is indispensable. 5.3 Capacitors that are switched on load or connected via external fuses shall have dischar
42、ge facilities. 5.4 Information on the requirements for the discharge of series connected capacitors may be taken from 6.8, 6.9 and 6.10 of IEC 60110-1 and from 5.1 of IEC 60143-1. 5.5 The terminals of capacitors with internally series connected elements shall be short-circuited before being disconne
43、cted. EN 60519-3:2005 7 NOTE Although a discharge device has operated, a residual charge may sometimes be left at the inter-connections of series-connected capacitors due to blown fuses, interrupted internal connections, differences of the capacitance values or dielectric recharging from DC componen
44、ts of the previous charge. 5.6 Capacitors in mains frequency installations without electronic power control shall be connected via protective devices. Where internal fuses are employed, external means of protection can be dispensed with. Capacitors for medium and high frequencies may be connected wi
45、thout protective devices. 5.7 Where capacitors are liquid-cooled, the provision given in 6.2.8 of IEC 60519-1 shall apply. 6 Mains frequency power sources In the case of mains frequency power sources which feed a single phase load from a three-phase supply and which employ capacitors and reactors to
46、 keep the three line currents in reasonable balance, series resonance causing overvoltages liable to impair safety may occur if the phase connection common to the capacitors and reactors of the balancing circuit becomes open-circuited, for example, by a blown fuse or a defective contactor in the lin
47、e. For such conditions, measures shall be provided to disconnect the supply, for example, overvoltage tripping of the supply circuit breaker. Contactors which control the three-phase supply to the reactor-capacitor combination shall be designed to ensure that the contact connected to the common poin
48、t of the reactor and capacitor closes earlier when switching on and opens later when switching off. Design shall take care of the risk of possible harmonic currents absorbed from the supply system due to parallel resonance. 7 Solid-state frequency converters 7.1 Solid-state frequency converters shal
49、l be protected at the input terminals to prevent transient overvoltages, which may occur during switching operations on the supply side, ensuring that safety is maintained. 7.2 Solid-state frequency converters shall have fast-acting overvoltage and overcurrent protection. 7.3 Additional measures shall be taken to avoid the occurrence of dangerous transient voltages due to rapid changes of load power. 7.4 Hazards that may occur to personnel in case of a fault due to stored energy shall be avoide
